Senior Platform Architect — Identity & Billing SaaS

Epignosis; Ohio; Hybrid; USD 150,000 - 190,000; Full time

Benefits offered by this job

Competitive salary and bonuses

Stock options for everyone

Health coverage and wellness support

Learning budget for growth

Hybrid work model

Part of Starttech Ventures ecosystem

Job summary

Epignosis is seeking a Principal Software Engineer to act as a technical authority across four SaaS products, unifying architectures into a connected platform. The role emphasizes identity, authentication, billing, and subscription systems, with hands-on engineering and strategic direction for rapid, scalable growth.

You will mentor engineers, review designs, and drive platform foundations consumed by multiple teams, while balancing business needs with architectural integrity across the product

Qualifications

• 6+ years building production software for SaaS products.
• Experience with multi-tenant architectures and data isolation.
• Strong security and threat modelling mindset.
• Ability to craft and communicate architecture decisions.
• Fluent written and spoken English; clear technical writing.

Responsibilities

• Set cross-product technical direction and architecture constraints.
• Lead design of shared platform services including identity and billing.
• Contribute hands-on engineering to key components.
• Raise the bar via code/design reviews and mentorship.
• Guide AI-assisted development with safe production release.
• Make build-vs-buy recommendations for foundational services.
• Identify and mitigate organizational technical risks.
• Bridge engineering and product leadership with clear trade-offs.

Skills

Multi-tenant SaaS

Security mindset

Influence without authority

Technical writing

Collaborative communication

TypeScript

Backend development

PHP backend

Tools

OAuth 2.0

OIDC

SAML

CI/CD

Infrastructure as Code

Observability

Team Topologies

Job description

Epignosis is seeking a Principal Software Engineer to act as a technical authority across four SaaS products, unifying architectures into a connected platform. The role emphasizes identity, authentication, billing, and subscription systems, with hands-on engineering and strategic direction for rapid, scalable growth.

You will mentor engineers, review designs, and drive platform foundations consumed by multiple teams, while balancing business needs with architectural integrity across the product